Abstract
Nowadays, the industrial world has developed awareness to risk and risk management especially to major risks with catastrophic consequences. Because of this; great efforts has been put to prevent and protect against these risks. The analysis and evaluation of risks are an essential steps to prevent the occurrence or to the reduce severity of the accidents, several methods are used to analyze and evaluate risk, they are divided into three categories qualitative, semi quantitative and quantitative. These methods differ in when, where and why to apply them, qualitative methods are generally easy to apply and fast in identifying the risks, quantitative methods are not as easy but provide a numerical value to the risk that helps in risk comparison in the case of evaluation or decision-making, and semi quantitative methods falls in between. In this framework the objective is to evaluate the performance of the safety barriers using layer of protection analysis (LOPA). It was applied on Haoud Berkaoui in Sonatrach one of the leading companies in oil and gas industry in Africa, we have chosen the new flared gas recovery project as the subject of our study as it is new and no previous work has been done on this subject, we have identified its most critical system and it was the separator V-160, this separator is crucial to the hole operating station, as it holds all the condensate at the end of the operation. We established a HAZOP study and we rely on it to realize LOPA that should be a step for organizations to move towards more semiquantitative and quantitative analysis. So we will try to realize this abstract method in the field. Hopefully this work can contribute to the company applied upon.
Highlights
This paper intends to be a part of creating a safer workplace by developing of a model for application of Layer of Protection Analysis (LOPA) for a production system
Layer of protection analysis (LOPA) is a semi quantitative tool for analyzing and assessing risk. In this part we describe the layer of protection analysis (LOPA) process, discuss the strengths and limitations of LOPA and describe the requirements for implementing LOPA in an organization
This step is the essence of this work it combines both LOPA steps 5 and 6, the LOPA tables illustrate the causeconsequence pairs in each scenario, determines the scenario frequency and compare it to the risk tolerance criteria
Summary
This paper intends to be a part of creating a safer workplace by developing of a model for application of Layer of Protection Analysis (LOPA) for a production system. It is found in another article that, Protective Layer Analysis (LOPA) can successfully respond to personnel protection issues and the preservation of the environment This technique is a simplified process of quantitative risk assessment, which uses order of magnitude categories to determine the frequency of causes, the severity of the consequences and the failure probability of independent layers of protection to analyze and assess the risk of harm. The LOPA requires the application of qualitative risk assessment methods to identify accident scenarios, including root causes and appropriate safeguards. This can be fulfilled, for example, by HAZOP studies or hypothesis analysis [8,9,10,11]
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